Fire-alarm.



G. H. CARROLL FIRE ALARM.

APPLICATION FILED NOV. 9, 1907.

PATENTED MAR. 10, 1908.

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GEORGE CARROLL, OF :VAQAVILLE, CALIFORNIA.

' FIRE-Ataxia.

No. 88 1 ,663 Specification of Letters atent. Patented March 10, 1 90s. 1

Application filed November 9,1901; r1a12io.4o1,499. o

To all whom it may concern:

Be it known that I, GEonoEH. CARROLL, a citizen of the United States of America, residing at Vacaville, in the county of Solano and State of California, have invented new and useful Improvements in Fire-Alarms, of which the following'is a specification.-

This invention relates to fire alarms,-. object of the invention being to provide an. alarm whichis automatically set in operation by theaction ofthe fire which destroys or injures a portion of the alarm mechanism, whereby the remainder of the alarm mechanism is released-and allowed to become opera- ,tive so as to establish an electrical circuit and ring an alarm included in saidkcircuit.

With the above and other objects in view,

the nature of which will appear as the description'proceeds, the invention consists in the novel construction, combination and arran ement of parts hereinafter fully -de-. scri ed', illustrated and claimed.

In the accompanying drawingl- Figure 1 is a diagrammatic plan view of t e apparatus of this invention. Fig. 2 is a plan view of the circuit closer.- Fig. 3'Iis a longitudinal section through the circuit closer, showing the parts in the positions they assume when the circuit is closed. Fig. 4 is a bottom plan 30. view of the circuitcloser. Fig. 5 is a plan 1 view of the tension device. Fig. 6 is a diametrical section through the tension device.

The circuitcloser embodies essentially a base 1 provided at suitable points with lugs 2- for positioning a suitable inclosing case or cover-3 whichsets on andagainst the base 1 and is held frictionally in place by means of a pair of clips 4 which en age op osite sides of the cover, as shown in igl.l3, the two clips 3 of t e opposite inbent extremities of a strip of spring metal 5 which passes under-the base 1 and up through slots or openings 6 therein so as to bear against the opposite sides of the cover.

Secured tothe base 1 withinthe cover is a plate 7 having upstanding guides 8 in which 18 mounted a ongitudinally movable slide.) in the form of a rodprovided at its outer end with an eye 10 adapted to have one endof a cord 11 attached thereto in the manner illustrated in Fig. 1.-

Disposed aroundthe rod or slide 9 is a coiled spring 1-1, one'end of which bears against one of the guides 8, while the oppo-. amst a collar 12 which is threaded upon t the e slide 9fso as to renderwl ac ent' guide 8 limits the outward moveapparatus in readiness for use. The base 1 is provided with ,18 and 19,. one of which'is in electrical contact with the base plate and the other of which-is ,insulatedfromthe base plate by means of an interposed insulating washer 20,

ally connected ,to the fastener or screw 16 by a short wire. 21 which connects said parts Fig. 4., A circuit containing an alarm bell 22 and-batter 23 has the circuit closer above described inc uded' therein, one wireof'the circuit connected to one of the binding posts and the other wire tothe remaining binding ost. Therefore, whenl contact is made bethe current passes from or other bu' ding In order to ho nected at itsextremities to a series of corner posts 29 extending; upward from the base a drum 27, said and other contained mechanism there 1s is engaged by spring clips 31 on the base and held in place thereby." The the ,ad'ustable collar .12, the slide 9'is rovided withanother adjust? threaded thereon, as shown which by striking against the ad- I ment of theslide 9 in the-actof setting the the last named binding post 19 being ele'ctric' post 19 to which the placed an inclosingcase or cover'30 which shaft 26 also said ciollar 'adjustable for varying the tension ner end of the slide in the direction of'and-j j base by means of 'a l binding posts and extends under "the base, as shown in tween the slide 9 and the contact piece 13,."

the binding post 18 through the base, through the plate 7-to the anydesired, oint in a house, dwelling, store dthe slide Qundertension, out of electrical contact with the contact ider-25 in which f with an eye 28 to which 24, and over and around the posts and spider a room or series of 33, this being accomplished with a suitable key applicable to the carries a housing plate 32 between which and the base 1 there is arranged a coiled s ring 33, one end of which is connected to a s oulder 34 on the shaft 26, while the opposite end is connected to one of the osts 29, as illustrated in Figs. 5 and 6. he shaft is also provided with a ratchet wheel 35 which is engaged by a detent 36 held in engagement with the ratchet wheel b a suita le spring 37.

In use the cord 11 w' 1 be stretched across rooms and preferably close to one of the Walls thereof, and the cord which is easily fusible will be placed under tension by connecting the same'to the drum 27 and winding the drum or lacing the same under tension by means 0 the spring the aid of end of the winding arbor or shaft 26, which arbor or shaft is squared, as shown at 38, to receive such key. As soon as the fire reaches the cord 11, said cord snaps, and the spring 11 then throws the slide into contact with the contact piece 13, thereby closing the circuit with the result above stated.

Having thus described the invention, what is claimed as new, 1s:-

1. A fire alarm embodying a circuit closer, a tension device, and a fusible cord connecting the tension device and circuit closer, the circuit closer embodying a spring-actuated slide, means for adjusting the tenslon of said slide, a collar for limiting the movement of the slide in 'one direction, and a contact piece located in the path of the slide, the slide and contact piece being included in an alarm circuit, substantially as described.

2. Fire alarm apparatus embodying a circuit closer, a tension device, and a fusible cord connecting the two, the circuit closer comprising a slide and a contact piece in the path thereof, the said slide and contact piece forming portions of an alarm circuit, and the tension device embodying a s )rin wound drum to which one end of the usib e cord is connected and upon which it is wound, substantially as described In testimony whereof I aflix my in presence of two Witnesses.

GEOR E H. CARROLL.

signature Witnesses:

W. W. LAWRENCE, J. L. HAYES. 

